I got a DEROGY lens, I'm sure it is a RR lens, but the the words on the barrel is "Eur. No.x" NOT "Apl. No.x", and also the aperture scale number on barrel is F6 NOT Apl's F8.
So, this is Derogy's RR portrait lens? Just like Voigtlander's Euryscope Serie IV?
Did any one have this "Eur F6" serie information about focus length? Thanks.
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